Power supply apparatus



FIG. 1 is a front, plan and right side perspective view of a power supply apparatus showing our new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is an enlarged left side elevational view thereof; and,

FIG. 7 is an enlarged right side elevational view thereof.

The broken line showing of environmental structure in FIG. 5 is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a power supply apparatus, as shown and described. 